title: LC-ESI-MS/MS method for oxidative stress multimarker screening in the exhaled breath condensate of asbestosis/silicosis patients.
abstract: The sensitive assay method was developed for a parallel, rapid and precise determination of the most prominent oxidative stress biomarkers: 8-iso-prostaglandin F(2α) a lipid oxidation biomarker, o-tyrosine an amino acid oxidation biomarker and 8-hydroxy-2'-deoxy-guanosine a nucleic acid oxidation biomarker. The method consisted of a pre-treatment part, freeze drying (lyophilization), serving the purpose of biomarkers concentration from the exhaled breath condensate and detection method LC-ESI-MS/MS, where the selected reaction-monitoring mode was used for its extremely high degree of selectivity and the stable-isotope-dilution assay for its high precision of quantification. The developed method is characterized by the following parameters: the precision was higher than 84.3% and the mean accuracy (relative error) was determined lower than 11.6%. The method was tested on samples obtained from patients diagnosed with asbestosis and silicosis, occupational diseases induced by oxidative stress, and then compared with samples from healthy subjects. The difference in biomarkers' concentration levels found between the two groups was statistically significant.
authors.affiliation: Institute of Chemical Technology, Technická 5, 166 28 Prague 6, Czech Republic. Institute of Microbiology, Vídeňská 1083, 142 20 Prague 4, Czech Republic.
authors.forename: K
authors.initials: K
authors.lastname: Syslová
authors.forename: P
authors.initials: P
authors.lastname: Kačer
authors.forename: M
authors.initials: M
authors.lastname: Kuzma
authors.forename: A
authors.initials: A
authors.lastname: Pankrácová
authors.forename: Z
authors.initials: Z
authors.lastname: Fenclová
authors.forename: S
authors.initials: S
authors.lastname: Vlčková
authors.forename: J
authors.initials: J
authors.lastname: Lebedová
authors.forename: D
authors.initials: D
authors.lastname: Pelclová
mesh_terms: D000328:Adult; D001195:Asbestosis / Q000378:metabolism*; D015415:Biomarkers / Q000032:analysis*; D001944:Breath Tests; D002853:Chromatography, Liquid; D005260:Female; D005612:Freeze Drying; D006801:Humans; D008297:Male; D018384:Oxidative Stress; D012829:Silicosis / Q000378:metabolism*; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D055815:Young Adult
chemical_list: D015415:Biomarkers